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-rw-r--r--src/mongo/db/pipeline/document_source_sort.cpp4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/mongo/db/pipeline/document_source_sort.cpp b/src/mongo/db/pipeline/document_source_sort.cpp
index 1ccc8a5d58d..3ba411e0499 100644
--- a/src/mongo/db/pipeline/document_source_sort.cpp
+++ b/src/mongo/db/pipeline/document_source_sort.cpp
@@ -485,6 +485,10 @@ intrusive_ptr<DocumentSourceSort> DocumentSourceSort::parseBoundedSort(
BSONElement key = args["sortKey"];
uassert(6369904, "$_internalBoundedSort sortKey must be an object", key.type() == Object);
+ // Empty sort pattern is not allowed for the bounded sort.
+ uassert(6900501,
+ "$_internalBoundedSort stage must have at least one sort key",
+ !key.embeddedObject().isEmpty());
SortPattern pat{key.embeddedObject(), expCtx};
{